Armature



(No Model.) M. RAHNER.

ARMATURB.

No. 505,957. Patented Oct. 3,1893.'

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UNITED STATES PATENT OFFICE.

MARTIN RAHNER, OF UNION, NEVIT JERSEY.

ARMATU RE.

SIECIFICATION forming part of Letters Patent No. 505,957, dated October3, 1893.

' Application filed December 7, 1892. Serial No. 454,331. (No model.)

To @ZZ whom, t may concern..-

Be it known that I, MARTIN RAHNER, a citizen of the United States, andaresident of the town of Union, Hudson county, New Jersey, have inventedcertain new and useful Improvements in Armatures, of which the followingis a specification.

This invention relates to armatures for dynamo-electric machines andelectric-motors; and the object of my invention is to provide a new andimproved armature which is simple in construction and from which any onecoil can easily and readily be removed without disturbing any of theothers.

The invention consists in the combination with a shaft, of end-plates onthe same, a series of core-pieces held between said endplates and aseparate and independent coil on each core-piece.

The invention also consists in the construction and combination of partsand details which will be fully described hereinafter and finallypointed out in the claims.

In the accompanying drawings, Figure l is a longitudinal sectional viewof my improved armature, showing one core wound and the other bare, andFig. 2 is a vertical transverse sectional view of the completedarmature.

Similar letters of reference indicate corresponding parts.

The armature is mounted on the shaft A carrying the usual commutator B,which may be of any desired construction. On said shaft A, two end-disksO C of non-magnetic material, for example, brass, are mounted, andbetween said disks a series of core-pieces D is mounted radially, whichcore-pieces increase in thickness from their inner toward their outeredges. Each core-piece is provided at each end and at the outer edgewith a lng E, and at the inner edge it is provided at each end with acorresponding lug E. The lugs E are provided with threaded apertures andbolts F are passed through apertures in the end-plates O and screwedinto the lugs E, said bolts being provided with heads at their outerends. A coil II of insulated wire is Said coils are formed in the usualmanner and proper insulating material is used between the severalwindings. 'Ihe ends of the coils H are connected with thecommutator-sections in any suitable manner. Each and every core-piece Dand the coil H thereon is entirely independent of any other coil and thecore-piece can be removed from the armature without disturbing any suchother coil, all that is necessary being to remove the screw-bolts F,when the corepiece and its coil can be removed.

In case by accident any one armature section or coil burns ont, it caneasily be removed and replaced by another. The snrfaces of the coils arenot at the outer periphery of the armature, but the outer edge of thecore-pieces are at said periphery. In case the Babbitt metal of thebearings melts and the shaft A becomes displaced, only the outer edgesof the core-pieces D can come in contact with the pole-pieces, and thusthere is no danger of scraping the covering 0E all the wires of thearmature, as frequently happens in the armatures used heretofore.

l-Iaving thus described my invention, I claim as new and desire tosecure by Letters Patentl. In an armature, the combination, with ashaft, of two end-disks on the same, a series of core-pieces heldradially between the endplates and fastened to said endplates by boltspassed through said end-plates into the ends of the corepieces and aseparate and independent coil on each core-piece, substantially as setforth.

2. In an armature, the combination, with a shaft, of two end-plates onthe same, a series of core-pieces held radially between the endplates,which core-pieces are provided with end-lugs at the outer and inneredges, bolts passed through the end-plates into the outer lugs of thecore-pieces and a separate and independent coil on each core-piece,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

MARTIN RAHNER.

Witnesses;

OscAE F. GUNZ, HARRY WILLAED GEIEFITHS.

